Wrapper



WRAPPER Filed Aug. 7, 1955 H. W. BROWN Dec. 28, 1937.

lllll/lIlllllllll/Illllll11,111 llllllllllll 1220822421332 v l Harry Waown,

Patented Dec. 248, 1937 UNITED STATES PATENT OFFICE Edward H. Augier,

trustee under agreement Framingham,

Mass., as and declaration of trust designatedl as Angier Laboratories Application' August 7, 1935, serial No. 35,116

2 Claims.

This invention relates to wrappings and more particularly to a wrapping in the form of a narrow strip adapted to be wound helically about an article to form an enclosing covering therefor.

Such helical wrapping is of particular advantage in packaging toric articles, such, for example, as coils of wire, coils of garden hose and vehicle tires. It is much used for these purposes and highly organized machines adapted to revolve the roll of wrapping material about the cross section of an article while the latter is advanced, such, for instance, as that shown in the patent to Wheildon 1,439,387, Dec. 19, 1922, are in general use. A cardinal object of my invention is to provide a durable, inexpensive wrapper having various advantages in use which will appear as the description proceeds.

My invention .will be well understood by reference to the following description of an illustrative embodiment thereof shown by way of example in the accompanying drawing, wherein:-

Fig. 1 is a view of a toric article, such as a coil of wire, partially enclosed in a wrapping formed from a strip of material indicated as drawn from a roll thereof;

Fig. 2 is an enlarged plan view of a portion of the wrapping strip with parts broken away;

Fig. 3 is an enlarged section of the same; and

Fig. 4 is a similar view showing the edges folded as may be done in applying the wrapping strip y to the article.

The wrapping takes the form of a narrow band, w, of indefinite length adapted to be packaged, if desired, in the form of a roll for use in existing wrapping machines or otherwise, as .indicated by the showing of such a. roll adjacent a partially wrapped article, a, in Fig. 1. 'Ihe band comprises two narrow, ribbon-like strips 5 and 1 of paper united by a layer 9 of suitable water- 40 proofing adhesive, such as asphalt. While for some purposes the band may be made in whole or in part of substantially inexpansible material, I preferably fo'rm these strips of resiliently expansible paper, as indicated by the diagram- 45 matic showing of crapings II. In Figs. 3 and 4 I have considered it unnecessary to attempt to illustrate the irregular surface produced by the crapings. Adjacent the margins ofthe band I may insert between the layers 5 and 1 and em- 50 bedded in the asphalt 9 longitudinally extending reinforcing strands I3 which may consist of cotton or jute yarns. I have here shown two yarns adjacent each edge and the edges of the strip may be folded over in application along lines about 55 between the two yarns of each pair, as illustrated in Fig. 4, it being common to edge fold a helically applied wrapping strip. Such edge fold is usually effected by the wrapping machine in application, and thus in Fig. 1 I have shown the band w in the form of a roll from which it is sup- 5 plied as a full width comparable to Fig. 3 and on the article to be wrapped with its edges folded, as in practice this folding would be effected during the wrapping operation as the wrapping strip is drawn from the supply roll. Yarns of the type 10 referred to have substantial stretch and, located as described, do not adversely affect the elasticity of the craped paper where such is used for the purposes intended.

Throughout the area of the band between the 15 sets of edge yarns I3, if such are used, that is, between the edges of the band and over a major portion of the width thereof and along a central zone thereof, I dispose a reinforcement which may consist of a substantially single strand I5 20 extending longitudinally in a gently sinuous curve. By referring to the strand as substantially single I distinguish between a reinforcement consisting of a number of .strands interwoven or overlain one on another to form a retic- 25 ulation and a, strand either actually single or substantially equivalent thereto, as, for example, two strands laid side by side and manipulated as one. There are no crossings of strands inthe central portion of the band to form knots or unevenness and the reinforcement, at least along the central zone, is throughout a single thickness of strand.

The curve formed by the strand I5 is gentle, as above described, and I prefer to provide a periodicity therein substantially greater in its amplitude; that is, the distance between successive nodes adjacent the opposite edges of the band and measured parallel to its length is greater than the transverse distance between these nodes measured parallel to its width. The strands thus make a relatively small angle to the length of the band, being more nearly longitudinal than transverse and yet in general extending along diagonal lines.

A band reinforced as described is easily packaged in the form of rolls and easily dispensed therefrom. The sinuous nature of the strand I5 permits it to give spring-like with the expanslble paper where that is utilized. In a helically wrapped package such as shown, tears may start by something catching an edge of a spire, and if one of the spires is torn apart the coverlng may commence to unravel and become displaced. In the present instance, if the edge is broken and the tear starts to travel across the width of the strip, the latter may give somewhat in the manner of a spring to prevent too sudden and sharp a disrupting strain thereon. At any' given place it-is presented substantially diagonally to the width of the strip and the tear on striking the strand is usually diverted thereby so that the paper tears along the strand, the tear stops short or is diverted backwardly toward the opposite edge and the strip is not easily severed entirely across so that-the wrappingmay vstai-t to unwind.

vindeiinite length adapted to be helically wound about a commodity comprising a pair of strips of paper, adhesive connecting said strips. longitudinal strands between the strips solely adjacent the margins thereof, and a substantially single, continuous, iibrous, reinforcing strand extending throughout the area between said longitudinal strands substantially as a gently sinuous. longitudinally extending curve.

2. A wrapping in the :form of a narrow band or tape of indenite length adapted to be helically wound about a commodity comprising a pair of strips of paper adhesively connected in superposed relation and receiving between them a substantially single, continuous, brous strand disposed in a single longitudinal sinuous curve of an amplitude approximating the width of the band but having the nodes spaced inwardly from the edges thereof, the period of the curve substantially exceeding the amplitude, the strand constituting an unreticulated reinforcement which at least along the major portion of the width of the band centrally thereof is at all points of a thickness no greater than that of the strand.

HARRY W. BROWN. 

